The New Zealand‐Dementia Prevention Research Clinics: Plasma biomarkers and the Alzheimer’s disease continuum Article Swipe
Erin E. Cawston
,
Leon Griner
,
Celestine YE Wong
,
Daniel J. Myall
,
Nicholas J. Ashton
,
Fernándo González‐Ortiz
,
Kaj Blennow
,
Henrik Zetterberg
,
Joanna M. Williams
,
Nicholas J. Cutfield
,
Tim Anderson
,
John C. Dalrymple‐Alford
,
Lynette J. Tippett
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1002/alz.093096
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1002/alz.093096
Background Single molecule array (Simoa) technology enables the detection of Alzheimer’s disease (AD) neuropathology in blood. This study compared cross‐sectional biomarker profiles for participants from the New Zealand‐Dementia Prevention Research Clinics (NZ‐DPRCs) who spanned the continuum from healthy older adults to a clinical diagnosis of AD. Method NZ‐DPRC participants were clinically classified as cognitively unimpaired adults (CU, n=34), subjective cognitive decline (SCD, n=65), non‐amnestic mild cognitive impairment (single and multi‐domain, non‐aMCI, n= 23), amnestic MCI (single and multi‐domain, aMCI, n=104), and AD (n=27). A cross‐sectional analysis quantified nine plasma biomarkers using the HD‐X Simoa analyser (Quanterix, Billerica, MA). These were: amyloid‐beta peptides (Aß1‐40; Aß1‐42); total and phosphorylated tau species (total‐tau; brain‐derived tau (BD‐tau); p‐tau181; p‐tau217; p‐tau231); neurofilament light (NfL); and, glial fibrillary acidic protein (GFAP). All biomarkers except for Aß1‐40, Aß1‐42 and the Aß1‐42/Aß1‐40 ratio were natural log‐transformed to approximate normality and improve homogeneity of variance. Plasma biomarkers across the five groups (CU, SCD, aMCI, non‐aMCI and AD) were assessed by linear regression adjusted for age and sex and Tukey’s HSD post‐hoc test was used for pairwise comparisons between classification groupings. Result This study included 253 participants from the NZ‐DPRCs (mean [SD] age, 69.8 [8.1] years, 131 females [52%], and 122 males [48%]). Biomarkers p‐tau217, GFAP, p‐tau181, Aß1‐42, BD‐Tau, Aß1‐42/Aß1‐40 ratio, p‐tau231 and NfL, all showed group differences ( F (4,246); P <0.05; η 2 p = 0.165, 0.109, 0.076, 0.073, 0.059, 0.058, 0.055, 0.044 respectively; Aß1‐40, P =0.06, η 2 p = 0.035; total‐tau, P =0.67,η 2 p = 0.010). Post‐hoc test for group comparisons showed significant differences ( P <0.05) for GFAP between AD vs CU, SCD, non‐aMCI as well as SCD vs MCI; p‐tau181 for AD vs CU, SCD, aMCI, non‐aMCI; p‐tau217 for AD vs CU, SCD, non‐aMCI as well as aMCI vs CU and SCD; p‐tau231 for AD vs non‐aMCI; Aß1‐42 for aMCI vs CU and SCD; Aß1‐42/Aß1‐40 ratio and BD‐tau for SCD vs aMCI. ROC analysis will be reported for the diagnostic accuracy of these blood analytes. Conclusion Simoa‐quantitated blood biomarkers in the NZ‐DPRC cohort showed utility for differentiating cross‐sectional groupings spanning the AD continuum.
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https://doi.org/10.1002/alz.093096Digital Object Identifier
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The New Zealand‐Dementia Prevention Research Clinics: Plasma biomarkers and the Alzheimer’s disease continuumWork title
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articleOpenAlex work type
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2024Year of publication
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2024-12-01Full publication date if available
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Erin E. Cawston, Leon Griner, Celestine YE Wong, Daniel J. Myall, Nicholas J. Ashton, Fernándo González‐Ortiz, Kaj Blennow, Henrik Zetterberg, Joanna M. Williams, Nicholas J. Cutfield, Tim Anderson, John C. Dalrymple‐Alford, Lynette J. TippettList of authors in order
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hybridOpen access status per OpenAlex
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Dementia, Medicine, Disease, Alzheimer's disease, Gerontology, PathologyTop concepts (fields/topics) attached by OpenAlex
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